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LG A4UW30GFH0 Service Manual

A3UW24GFH0\ A2UW18GFH0\ LMU240HHV\ LMU180HHV\ LMU300HHV

Made by: LG
Type: Service Manual
Category: Air Conditioner
Pages: 14
Size: 3.99 MB

 

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Please read this manual carefully before operating your set and retain it for future reference.
E-View
Multi Air Conditioner
A4UW30GFH0 [LMU300HHV] / A3UW24GFH0 [LMU240HHV]
A2UW18GFH0 [LMU180HHV]

P/NO : MFL67452453

SERVICE MANUAL

AIR

CONDITIONER

CONFIDENTIAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, 
modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior 
written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this 
prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

 


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- 2 -

1. Specification

Note:

1. All data are based on the following conditions:

- Cooling Temperature : Indoor 26.7°C(80°F) DB / 19.4°C(66.9°F) WB

Outdoor 35°C(95°F) DB / 23.9°C(75°F) WB

- Heating Temperature : Indoor 21.1°C(70°F) DB / 15.6°C(60.1°F) WB

Outdoor 8.3°C(46.9°F) DB / 6.1°C(43°F) WB

- Piping Length : Interconnected Pipe Length = 5 m (16.4 ft)
- Difference Limit of Elevation (Outdoor ~ Indoor Unit) is Zero.

2. Wiring cable size must comply with the applicable local and national code.

3. Due to our policy of innovation some specifications may be changed without

notification.

4. Sound Level Values are measured at Anechoic chamber. 

Therefore, these values can be increased(maximum 3dB(A)) owing to ambi-
ent conditions during opration.

** : The unit could be operated on the followig temperature range only when Low

Ambient Kit installed.

- Cooling : Outdoor Temperature -20°C(-4°F) ~ -10°C(14°F) DB

Model Name

A2UW18GFH0

[LMU180HHV]

A3UW24GFH0

[LMU240HHV]

A4UW30GFH0

[LMU300HHV]

Capacity

Nominal

Btu/h Class

18,000

24,000

30,000

Cooling

Min~Rated~Max

Btu/h

8400~18000~19980

8400~24000~30000

8400~28400~34080

Heating

Min~Rated~Max

Btu/h

10248~22000~24000

10248~26000~31200

10248~28600~41600

Power Input

Cooling

Min~Rated~Max

kW

0.87~1.33~1.92

0.93~1.78~2.63

0.94~2.27~3.47

Heating

Min~Rated~Max

kW

1.24~2.20~3.29

1.25~2.12~3.47

1.29~2.32~3.55

EER/COP

Non Ducted

-

13.5/2.9

13.5/3.6

12.5/3.6

SEER/HSPF

Non Ducted

-

21.0/10.0

21.0/10.7

20.0 / 11.0

Mixed

-

19.25/9.5

19.0/9.85

18.75/10.25

Ducted

-

17.5/9.0

17.0/9.0

17.5/9.5

Power Supply

V, Ø, Hz

208/230, 1, 60

208/230, 1, 60

208/230, 1, 60

Running Current

Cooling

Min~Rated~Max

A

4.1~6.1~8.7

4.2~7.8~11.9

4.0~10.2~16.7

Heating

Min~Rated~Max

A

5.6~9.8~14.9

4.8~9.9~14.9

4.2~10.9~15.9

Starting Current

Cooling

Max

A

-

-

-

Heating

Max

A

-

-

-

Wiring Connections

Power Supply Cable (Included Earth)

No. x AWG

3C x 12

3C x 12

3C x 12

Power and Communication Cable
(Included Earth)

Outdoor ~ BD Unit

No. x AWG

-

-

-

Combination

Sum of Indoor Units Capacity

Max

kBth/h

24

33

40

Number of Indoor Units

Max

EA

2

3

4

Number of BD Units

Max

EA

-

-

-

Casing Color

-

Warm Gray

Warm Gray

Warm Gray

Dimensions

W x H x D

mm

950 x 834 x 330

950 x 834 x 330

950 x 834 x 330

W x H x D

inch

37-13/32 x 32-27/32 x 13

37-13/32 x 32-27/32 x 13

37-13/32 x 32-27/32 x 13

New Weight

kg(lbs)

67 (147.7)

69 (152.1)

69 (152.1)

Compressor

Type

-

Twin Rotary

Twin Rotary

Twin Rotary

Model

Model x No.

GJT325M X 1

GJT325M X 1

GJT325M X 1

Motor Type

-

BLDC

BLDC

BLDC

Motor Output

W x No.

-

-

-

Refrigerant

Type

-

R410A

R410A

R410A

Precharged Amount

g (oz)

2,800 (98.8)

3,200 (112.8)

3,200 (112.8)

Chargeless-Pipe Length

m (ft)

15 (49.2)

22.5 (73.8)

30 (98.4)

Additional Charging Volume

g/m (oz/ft)

20 (0.22)

20 (0.22)

20 (0.22)

contorl

-

Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve

Refrigerant Oil

Type

-

FVC68D

FVC68D

FVC68D

Charged volume

cc x No.

950 x 1

950 x 1

950 x 1

Heat Exchanger

(Row x Column x Fins per inch) x No.

-

(3 x 38 x 16) x 1

(3 x 38 x 16) x 1

(3 x 38 x 16) x 1

Fan

Type

-

Propeller

Propeller

Propeller

Air Flow Rate

m

3

/min(ft

3

/min) x No.

65 (2,295)

65 (2,295)

65 (2,295)

Fan Motor

Type

-

BLDC

BLDC

BLDC

Output

W x No.

124.2 x 1

124.2 x 1

124.2 x 1

Sound Pressure Level

Cooling

Rated

dB(A)

50

52

52

Heating

Rated

dB(A)

54

55

55

Sound Power Level

Cooling

Rated

dB(A)

-

-

-

Piping Connections

Liquid

Outer Dia.

mm(inch)

Ø6.35 (1/4)

Ø6.35 (1/4)

Ø6.35 (1/4)

Gas

Outer Dia.

mm(inch)

Ø9.52 (3/8)

Ø9.52 (3/8)

Ø9.52 (3/8)

Piping Length

Total Piping

Max.

m (ft)

50 (164)

75 (246.1)

75 (246.1)

Main Piping

Max.

m (ft)

-

-

-

Total Branch Piping

Max.

m (ft)

-

-

-

Each Branch Piping

Max.

m (ft)

25 (82.0)

25 (82.0)

25 (82.0)

Maximum Height
Difference

Outdoor Unit ~ Indoor Unit

Max.

m (ft)

15 (49.2)

15 (49.2)

15 (49.2)

Indoor Unit ~ Indoor Unit

Max.

m (ft)

7.5 (24.6)

7.5 (24.6)

7.5 (24.6)

BD Unit ~ Indoor Unit

Max.

m (ft)

-

-

-

Operation Range
(Outdoor Temperature)

Cooling

Min. ~ Max.

℃ DB(℉ DB)

-20(-4)** ~ 48(118)

-20(-4)** ~ 48(118)

-20(-4)** ~ 48(118)

Heating

Min. ~ Max.

℃ DB(℉ DB)

-25 (-13) ~ 24 (75)

-25 (-13) ~ 24 (75)

-25 (-13) ~ 24 (75)

 


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- 3 -

2. List of Functions & Accessory

Note :

O : Applied, × : Not applied

2.2 List of Accessory

2.1 List of Functions

Note :

O : Applied, × : Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

Category

Functions

A4UW30GFH0[LMU300HHV]
A3UW24GFH0[LMU240HHV]
A2UW18GFH0[LMU180HHV] 

Reliability

Defrost/Deicing

O

High pressure switch

X

Low pressure switch

X

Phase protection

X

Restart delay (3-minutes)

O

Self diagnosis

O

Soft start

O

Test function

X

Convenience

Night Silent Operation

O

Wiring Error Check

O

Peak Control

O

Mode Lock

O

Forced Cooling Operation (Outdoor Unit)

O

Network function

Network soluation(LGAP)

O

Device

A4UW30GFH0[LMU300HHV]
A3UW24GFH0[LMU240HHV]
A2UW18GFH0[LMU180HHV] 

Central Controller

AC Ez (Simple Controller)

PQCSZ250S0

AC Ez Touch 

PACEZA000

AC Smart IV

PACS4B000

ACP IV

PACP4B000

AC Manager IV

PACM4B000

PI485

PMNFP14A0/PMNFP14A1

BNU (Building Network Unit)

LONWORKS Gateway

PLNWKB000

BACnet Gateway

PQNFB17C0

Installation

Y branch

X

Header branch

X

Air Guide

X

PDI (power distribution indicator)

PQNUD1S00

ODU Dry Contact

X

Low Ambient Kit

O (Logical operation)

 


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- 4 -

3. Piping Diagrams

Discharge 

 Temperature 

Thermistor 

Suction

Temperature

Thermistor

Inverter 

Accumulator

Compressor 

Electronic 

Expansion 

Valve 

Condenser Out 

 Temperature 

Thermistor 

Inlet Air 

Temperature 

Thermistor 

Outdoor Unit 

Ø 6.35
Flare Connection

Ø9.52
Flare Connection 

Condensing 

Temperature 

Thermistor 

ROOM A

ROOM A

ROOM B

Field Piping
Liquid(Ø6.35) 

Field Piping
Gas(Ø9.52) 

: Cooling 
: Heating 

ROOM B

ROOM C

ROOM D

Main SVC V/V 

ROOM C

ROOM D

Main SVC V/V 

Pressure
Sensor

PCB Connector

Description

CN_MID_BR

Cond Middle Pipe

CN_DISCHARGE_BK

Discharge Pipe

CN_C_PIPE_VI

Cond Out Pipe 

CN_SUCTION_GR

Suction Pipe

CN_AIR_YL

Air

CN_H_PRESS_RD

Pressure Sensor

CN_H_GAS_BK

Hot Gas Valve

CN_4WAY_YL

4WAY valve

CN_HEATER_BL

Base pan heater

3.1 30k

 


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- 5 -

Discharge 

 Temperature 

Thermistor 

Suction

Temperature

Thermistor

Inverter 

Accumulator

Compressor 

Electronic 

Expansion 

Valve 

Condenser Out 

 Temperature 

Thermistor 

Inlet Air 

Temperature 

Thermistor 

Outdoor Unit 

Ø 6.35
Flare Connection

Ø9.52
Flare Connection 

Condensing 

Temperature 

Thermistor 

ROOM A

ROOM A

ROOM B

Field Piping
Liquid(Ø6.35) 

Field Piping
Gas(Ø9.52) 

: Cooling 
: Heating 

ROOM B

ROOM C

Main SVC V/V 

ROOM C

Main SVC V/V 

Pressure
Sensor

PCB Connector

Description

CN_MID_BR

Cond Middle Pipe

CN_DISCHARGE_BK

Discharge Pipe

CN_C_PIPE_VI

Cond Out Pipe 

CN_SUCTION_GR

Suction Pipe

CN_AIR_YL

Air

CN_H_PRESS_RD

Pressure Sensor

CN_H_GAS_BK

Hot Gas Valve

CN_4WAY_YL

4WAY valve

CN_HEATER_BL

Base pan heater

3.2 24k

 


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- 6 -

Discharge 

 Temperature 

Thermistor 

Suction

Temperature

Thermistor

Inverter 

Accumulator

Compressor 

Electronic 

Expansion 

Valve 

Condenser Out 

 Temperature 

Thermistor 

Inlet Air 

Temperature 

Thermistor 

Outdoor Unit 

Ø 6.35
Flare Connection

Ø9.52
Flare Connection 

Condensing 

Temperature 

Thermistor 

ROOM A

ROOM A

ROOM B

Field Piping
Liquid(Ø6.35) 

Field Piping
Gas(Ø9.52) 

: Cooling 
: Heating 

ROOM B

Main SVC V/V 

Main SVC V/V 

Pressure
Sensor

PCB Connector

Description

CN_MID_BR

Cond Middle Pipe

CN_DISCHARGE_BK

Discharge Pipe

CN_C_PIPE_VI

Cond Out Pipe 

CN_SUCTION_GR

Suction Pipe

CN_AIR_YL

Air

CN_H_PRESS_RD

Pressure Sensor

CN_H_GAS_BK

Hot Gas Valve

CN_4WAY_YL

4WAY valve

CN_HEATER_BL

Base pan heater

3.3 18k

 


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- 7 -

4. Wiring Diagrams

4.1 30k

 


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- 8 -

4.2 24k

 


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- 9 -

4.3 18k

 


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- 10 -

SW1

CN-BLDC

CN-MID

CN-LGMV

CN-AIR

CN-C_PIPE

CN-SUCTION

CN-DISCHARGE
CN-H_PRESS

CN-EEV4

CN-EEV3
CN-EEV2

CN-EEV1

CN-H_GAS

CN-4WAY

CN-HEATER2

REACTOR_OUT1

REACTOR_IN

REACTOR_OUT2

CN-POWER

CN-UVW

INV PCB

 


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- 11 -

5. Exploded View

349480

437211

237202

559010

546810

137213C

447910

435512

554031

435300

554160

550140

W6200

649950

268711A

430410

137213A

435301

263230A

263230B

561410

263230C

W6631

437212

552115

552113

263230D

263230E

268711B

W49810

552203A

165000

552203B

661400C

661400B

661400A

552200B

661400D

552116

W6640A

W6640B

152503

W4986B

W4986A

549610

552202

137213B

Location No.

Description

Sensor Information

Housing Color

263230A

Thermistor(CN_DISCHA_BK)

Discharge Pipe

Black

263230B

Thermistor(CN_SUCTION_GR)

Suction Pipe

Green

263230C

Thermistor(CN_C_PIPE_VI)

Cond Out Pipe

Violet

263230D

Thermistor(CN_MID_BR)

Cond Middle Pipe

Brown

263230E

Thermistor(CN_AIR_YL)

Air

Yellow

165000

CN_H_PRESS_RD

Pressure Sensor

Red

5.1 30k

 


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- 12 -

349480

437211

237202

559010

546810

137213C

447910

435512

554031

435300

554160

550140

W6200

649950

268711A

430410

137213A

435301

263230A

263230B

561410

263230C

W6631

437212

552115

552113

263230D

263230E

268711B

W49810

552203A

165000

552203B

661400C

661400B

661400A

552200B

552116

W6640A

W6640B

152503

W4986B

W4986A

549610

552202

137213B

Location No.

Description

Sensor Information

Housing Color

263230A

Thermistor(CN_DISCHA_BK)

Discharge Pipe

Black

263230B

Thermistor(CN_SUCTION_GR)

Suction Pipe

Green

263230C

Thermistor(CN_C_PIPE_VI)

Cond Out Pipe

Violet

263230D

Thermistor(CN_MID_BR)

Cond Middle Pipe

Brown

263230E

Thermistor(CN_AIR_YL)

Air

Yellow

165000

CN_H_PRESS_RD

Pressure Sensor

Red

5.2 24k

 


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- 13 -

349480

437211

237202

559010

546810

137213C

447910

435512

554031

435300

554160

550140

W6200

649950

268711A

430410

137213A

435301

263230A

263230B

561410

263230C

W6631

437212

552115

552113

263230D

263230E

268711B

W49810

552203A

165000

552203B

661400B

661400A

552200B

552116

W6640A

W6640B

152503

W4986B

W4986A

549610

552202

137213B

Location No.

Description

Sensor Information

Housing Color

263230A

Thermistor(CN_DISCHA_BK)

Discharge Pipe

Black

263230B

Thermistor(CN_SUCTION_GR)

Suction Pipe

Green

263230C

Thermistor(CN_C_PIPE_VI)

Cond Out Pipe

Violet

263230D

Thermistor(CN_MID_BR)

Cond Middle Pipe

Brown

263230E

Thermistor(CN_AIR_YL)

Air

Yellow

165000

CN_H_PRESS_RD

Pressure Sensor

Red

5.3 18k

 


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